According to the writer, the responsibility for the kid‘s watching adult television and watching it for a long time should be undertaken by__________. 查看材料
A.
the television stations
B.
the society
C.
TV programs
D.
their parents
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【简答题】若字符串s=“software”,则其子串个数为:If the string s = "software", then the number of its sub-string is: